Crappy way to forward network traffic to my home server without public IP. Somewhat similar to Tailscale Funnel, but allows for custom domain names. And it's cheaper than a full VPS. 😇

1. You are using Tailscale
2. There is one server in your tailnet, which handles incoming HTTP(S) traffic and forwards it to proper services.
   • It should have valid TLS certificates.
   • Using Caddy with DNS challenge works really well.

Deploy:

flyctl launch
flyctl ips allocate-v4
flyctl secrets set TARGET_IP=...
flyctl secrets set TAILSCALE_AUTH_KEY=...
flyctl deploy

DNS config:

• set an A record for the gateway with the IP from Fly.io (for example gateway.vsq.cz -> $(flyctl ips list))
• for all the services, use CNAME records pointing to the gateway record
  • this way, if you have to change it in the future, it won't be that hard

Do not rely on this for any critical connections. The setup is not at all robust and will definitely break.